JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">  
        <img class="img" src="http://www.bastards-design.de/wordpress/assets/aa_2.jpg"/>
    </div>

CSS

* {
	-webkit-box-sizing: border-box; /* Android = 2.3, iOS = 4 */
	-moz-box-sizing: border-box; /* Firefox 1+ */
	box-sizing: border-box; /* Chrome, IE 8+, Opera, Safari 5.1 */
}


html,
body
{
    height:100%;
    width:100%;
    padding:10px;
}

.container
{
    height:100%;
    width:auto;
    background:green;
}
.img
{
    display: inline;
    width: auto;
    height:100%;
}